Not a LE guy, but I can speak for the 64.
I love the thing, it's a NY1 config, has about a 10lb DAO trigger and is very smooth.
+P ammo should be cake in any numbered model K frame (generally speaking, post WWII).
Last time out, I ran a box of +P 135gr Gold Dots from it at the local outdoor range, shooting at 25yrds. The sights are dead-on with 158gr as you'd expect, but the 135gr is pretty close enough from the heavy barreled 4" guns.
I like the sq butt with a Tyler insert, prefer round on the K frame snubby.

Very easy gun to shoot fast and accurate if you're familiar with DA revolver triggers.